PAT上分记(c++ + 完美过关)---1012---数字分类

#include<iostream>
using namespace std;
int main()
{
	int n,cnt=0,k=0,j=1,A1=0,A2=0,A3=0,A4=0,A5=0;
	cin>>n;
	for (int m=0; m<n; m++)
	{
		int i;
		cin>>i;
		if(i%5==0)
		{
			if(i%2==0)
			A1 += i;
		}
		else if (i%5==1)
		{	
			i *= j;
			A2 += i;
			j *= -1;
			k++;			
		}
		else if (i%5==2)
			A3++;
		else if (i%5==3)
		{
			A4 += i;
			cnt++;
		}
		else if (i%5==4)
		{
			if (A5<i)
			A5=i;	
		}			
	}
	if (A1==0)cout<<"N";
	else printf("%d",A1);
	if (k==0)cout<<" N";
	else printf(" %d",A2);
	if (A3==0)cout<<" N";
	else printf(" %d",A3);
	if (A4==0)cout<<" N";
	else printf(" %.1f",(double)(A4*1.0)/cnt);
	if (A5==0)cout<<" N";
	else printf(" %d",A5);
	return 0;
}